Why do people never feel hungry on a beach
腦筋急轉彎最早起源於古代印度。就是指當思維遇到特殊的阻礙時，要很快的離開習慣的思路，從別的方面來思考問題。現在泛指一些不能用通常的思路來回答的的智力問答題。腦筋急轉彎分類比較廣泛：有益智類，搞笑類，數學類，成人類等。 腦筋急轉彎是種娛樂方式，同時也是一種大衆化的文字遊戲。
1、Why do people never feel hungry on a beach?
2、What's the difference between a monkey and a flea?
3、What hangs on the wall without nail or string?
答案：
1、Because of the sand which is there
2、A monkey can have fleas but a flea cannot have monkeys
3、Cobweb
